Abstract: An apparatus and method for facilitating the transfer of an oscillating ventilator apparatus from one patient to the next, without requiring disinfection of the air pulse generating diaphragm and components, by separating the airway of the patient from the air pulse generating apparatus by a patient isolation apparatus comprising a patient isolation connection unit which mounts a flexible, fluid-impervious diaphragm in sealing relation to the ventilator housing and in adjacent relationship to the outer face of the air pulse generating apparatus, whereby no fluids emanating from the patient can contact said air pulse generating apparatus. The patient isolation apparatus may be disposed of after use with one patient, or may be disinfected and reused.